mlx10407 Melexis Company, mlx10407 Datasheet - Page 8

• Manufacturer Part Number: mlx10407
• Description: Five-channel Gauge Driver W/ Serial Link
• Manufacturer: Melexis Company

PWM Generation
1) Logometers 360° ( Logo 1 and Logo 2 ):
From the angle value received from the MCU (range [0° - 89.8°]), the 10407 generates two PWM
signals (9 bit resolution) :
The 10407 uses a 512x9 ROM containing the sine of all angular values in the range [0° -89.8°]
(note that the lsb value of the angle is not used).
An angle value greater than 90° is obtained using different quadrant values :
The PWM are switched to the outputs depending on the value of the quadrant :
The PWM frequency is given by :
2) Logometers 90°
3901010407
Rev. 003
The first one represents the sine PWMSIN,
The second one is the cosine PWMCOS.
Q1 (D14D15 = 00) > 0° =< a < 90°
Q2 (D14D15 = 01) > 90° =< a < 180°
Q3 (D14D15 = 10) > 180° =< a < 270°
Q4 (D14D15 = 11) > 270° =< a < 360°
a is the angle value
Logometer 1 is driven by outputs SIN1M/P COS1M/P,
Logometer 2 is driven by outputs SIN2M/P COS2M/P.
F
There are three separate PWM outputs for Logo 3, Logo 4 and Logo 5
PWM
= F
OSC
/ 512 (F
OSC
= Crystal oscillator frequency)
QUADRANT
D14
0
0
1
1
Page 8
SIN1M
D15
0
1
0
1
PWMCOS
PWMSIN
SIN1P
0
0
PWMCOS PWMSIN
PWMSIN
COS1M
0
0
.
PWMCOS
COS1P
0
0
PWMCOS
Aug/02
PWMSIN
0
0